The Trick or Treat Bundle is a promotional item that was available for Halloween 2015. The chest contains both a 2015 Headless Horseman Mask and a Headless Horseman Axe, and these contents are given when the chest is right-clicked. The chest was available through /promo trickortreat.

Upon the item's initial release, there was a bug that caused the chest's items to disappear entirely. This was fixed immediately, and the chest is now safe to open.